2000 Toyota 4Runner Blower motor (fan) stuck in on position

2000 TOYOTA 4RUNNER
144,000 MILES • 6 CYL • 4WD • AUTOMATIC
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GDMAC3K
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Blower motor fan blows warm/hot air constantly - even when in "OFF" position on dash panel. Blows air out of front passenger floor position. The only way to make it stop is to turn off the ignition. To offset the interior discomfort, I need to turn ON A/C, with Fan set to HIGH position.
Oct 7, 2010 at 10:19 AM
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KHLOW2008
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Hi gdmac3k,

Thank you for the donation.

The blower fan motor relay is being activated when the ignition switch is turned on.

Is the air speed low, medium or high?
Are you able to control the air speed with the blower switch?

Possible causes are :

1. Faulty blower switch, ( higher possibility).

2. Relay Yellow/Red wire shorted to body ground, ( this would result in the blower running at highest speed)

The air coming out of passenger floor position indicates a fault in the air outlet servomotor.

Is vehicle equipped with manual or automatic climate control?
Oct 8, 2010 at 9:16 AM
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GDMAC3K
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answers to your questions:

-blower speed is low
-cannot control air speed with blower switch
-vehicle has automatic climate control
Oct 12, 2010 at 11:39 AM
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KHLOW2008
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Check the blower motor linear controller,( located behind right side of dash).

Unplug it and test if the blower works correctly.
Oct 13, 2010 at 9:21 AM
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GDMAC3K
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Embarassing. The switch controlling the REAR seating area heat and AC levels was ON. Operator error.
Oct 14, 2010 at 4:05 PM
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KHLOW2008
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There is always a first for everything so just laught it over and be done, lol.

Have a nice day.
Oct 14, 2010 at 4:22 PM